Unless I hear otherwise from partners, I think Sam and Ruby of mine would probably end up in the class! Sam was just at a loss and basically terrified of touching the kid. Ruby treated it a little like a foreign object/alien, and I cannot imagine that she and Sol were model parents.
The others were fine-ish: Hal was extremely overexcited and an enthusiastic parents (he has a niece, so he's excellent with kids and has a good deal of experience with them); Aggie was fine, and Garrett was dreadful, but I imagine Scor covered for him.